05: Character Sets

In this exercise you'll learn to match sets of characters rather than just any charactor or a single character.

What is a Set?

A "set" is a list of items that must match exactly, but not in any particular order. The advantage of a set is you can give a range of values to match, which make it easier to write complex regex. For example, if you wanted to only match every character of the alphabet you could write [a-z] which I read as "match 'a' through 'z'."